Island



JOHN A. MOORE, OF PROVIDENCE, RHODE ISLAND.

Letters Patent Ne. 80,084, dated July 21, 1868.

IMIBOVED ROOFING-CEMENT. v

on some more: no lijl'fit i-"rites @atcnt ant making gym at the 5am.

TO WHOM IT MAY CONCERN:

Be it known that I, JOHN.A- MOORE, of the city and county of Providence,and State of Rhode Island, have invented-a. certain new and usefulRoofing-Cement and I do declare that thofollowing is a true and correetenumeration of the component parts thereof and description of theproportions and mode of preparation. I The. matter of proportion cannotbe definitely described so as to cover all combinations capable ofproducing a. material more or less fitted for the purpose desired; Iwill therefore state that from actual study, experiment, andresulin'acement, composed of mineral matter in proportions subs tentially asherein described, has proven to'be most valuable.

My composition consists of the following ingredients, viz:

Clay, mixed with plmnhago and sand. Proportion to be used, ii'ty-fiveper cent.

Coal, anthracite. Proportion to be used, twentydive per cent.

Asbestos, (iron trace.) Proportion to he used, five per cent.

Ilumbago, decomposed, {mm trace.) Proportion to be used, ten per cent.

Fuller's earth, (iron trace, &c.) Proportion to he used, five per cent.

The above ingredients ground and ready for use.

The proportions are mainly as enumerzitcd above.

An analysis of the some would show substantially as f0llows,'viz:

Alurnin'n, forty per cent.

'Plumbngo, eight per cent.

Asbestos, four per cent.

Carbon, fifteenper cent.

Silica, twenty-five per cent.

Iron, three per cent.

, Lime, two per cent.

Magnesia, three per cent.

These ingredients when finely ground, as shown in sample 6, are mixedwith ordinnry-g c s-tar, or its equivalent, (see sample 7,) the same toboot a sufficient quantity to unite the wholeintd plastic 'mass, afterwhich is applied to roofs, 820., in an obvious manner.

Many weeks exposure to the sun and air is requisite to harden thecement,'it being meunwhilo'impervicus to water. Owing to the gradualhardening, it never seams nor cracks-L Even in its'ha rdest condition itis suilieiently elastic to prevent its being broken by treading uponvit,or by anyreaspnablo usage. I I

v experiment and study I have discovered that nature affordsu'combinetio'n strikinglysimilar to' that herein described. It is foundmore particularly in the vicinity of the unthracitewoal mensui'es of theisland and State of Rhode Island. Veins of the same have been ioundneurly: F' Ill- Wiillill combination as invented and heroin enumerated.

I thereforeclnim as my own invention, and desire to secure bf'Letters"Potnt--.

The manufacture of a roofing-cement, hymixmg vith coal-tar, or othersimintr-substnncgalumme, plumlingo, asbestos, carbon, silica, iron,lime, and magnesia theproportio'ns *substL c-ially ns described, in themanner and for the purposes specified, whethenfound'innat'hr'eoriprepared by art,

JOHN A. MOORE.

Witnesses:

,W'ILLIAM W. Brennan,

H. G. BEACH.

